Samsung’s Galaxy Tab S4 and Tab S5e tablets are now receiving the Android 10 update with One UI 2.1 and the June 2020 Android security patch.
Source: Samsung Galaxy Tab S4 and Tab S5e start getting Android 10 with One UI 2.1 | Android Central
Source: Samsung Galaxy Tab S4 and Tab S5e start getting Android 10 with One UI 2.1 | Android Central